The document discusses the properties of congruent figures, including: - Corresponding sides are proportional and corresponding angles are equal (congruence) - Triangles are congruent if three sides are equal (SSS), three angles are equal (AAA), two sides and the included angle are equal (SAS), or one side, two angles (ASA, AAS, SAA) - The document provides examples of using proportional reasoning to solve problems involving similar figures and triangles. It includes 10 practice problems with solutions.